https://www.ejercicios-fyq.com/Types-of-forces-at-a-distance-or-through-contact-4841 Indicate which of these phenomena are produced by forces at a distance and which are produced by forces through contact: a) The motion of a train due to magnetic levitation. b) The deformation of a spring when a weight is attached to it. c) The skidding of a car on a pool of water. d) The formation of the aurora borealis. e) The motion of a cupboard when pushed. es SPIP - www.spip.net